public static bool GetSpiderSpawnPosition(out MatrixD spawnPosition, Vector3D?oldPosition)
{
spawnPosition = MatrixD.Identity;
Vector3D?position = null;
MyPlanet planet = null;
foreach (var player in Sync.Players.GetOnlinePlayers())
{
if (player.Id.SerialId != 0)
{
continue;
}
if (player.Character == null)
{
continue;
}
position = player.GetPosition();
planet = MyGravityProviderSystem.GetNearestPlanet(position.Value);
var animalSpawnInfo = GetDayOrNightAnimalSpawnInfo(planet, position.Value);
if (animalSpawnInfo == null || animalSpawnInfo.Animals == null ||
!animalSpawnInfo.Animals.Any(x => x.AnimalType.Contains("Spider")))
{
position = null;
planet = null;
continue;
}
if (oldPosition != null) // prevent teleporting from planet to planet
{
var planetOld = MyGravityProviderSystem.GetNearestPlanet(oldPosition.Value);
if (planet != planetOld)
{
position = null;
planet = null;
continue;
}
}
break;
}
if (!position.HasValue || planet == null)
{
return(false);
}
Vector3D gravity = planet.GetWorldGravity(position.Value);
if (Vector3D.IsZero(gravity))
{
gravity = Vector3D.Down;
}
else
{
gravity.Normalize();
}
Vector3D tangent, bitangent;
gravity.CalculatePerpendicularVector(out tangent);
bitangent = Vector3D.Cross(gravity, tangent);
Vector3D start = position.Value;
start = MyUtils.GetRandomDiscPosition(ref start, 20.0f, ref tangent, ref bitangent);
start -= gravity * 500;
Vector3D translation = planet.GetClosestSurfacePointGlobal(ref start);
Vector3D dirToPlayer = position.Value - translation;
if (!Vector3D.IsZero(dirToPlayer))
{
dirToPlayer.Normalize();
}
else
{
dirToPlayer = Vector3D.CalculatePerpendicularVector(gravity);
}
spawnPosition = MatrixD.CreateWorld(translation, dirToPlayer, -gravity);
return(true);
}